The Profiler Class will display benchmark results, queries you have run,
and $_POST data at the bottom of your pages. This information can be
useful during development in order to help with debugging and
optimization.

Each section of Profiler data can be enabled or disabled by setting a
corresponding config variable to TRUE or FALSE. This can be done one of
two ways. First, you can set application wide defaults with the
application/config/profiler.php config file.

Example:

$config['config']=FALSE;$config['queries']=FALSE;

In your controllers, you can override the defaults and config file
values by calling the set_profiler_sections() method of the
Output Library:

Available sections and the array key used to access them are described
in the table below.

Key

Description

Default

benchmarks

Elapsed time of Benchmark points and total execution time

TRUE

config

CodeIgniter Config variables

TRUE

controller_info

The Controller class and method requested

TRUE

get

Any GET data passed in the request

TRUE

http_headers

The HTTP headers for the current request

TRUE

memory_usage

Amount of memory consumed by the current request, in bytes

TRUE

post

Any POST data passed in the request

TRUE

queries

Listing of all database queries executed, including execution time

TRUE

uri_string

The URI of the current request

TRUE

session_data

Data stored in the current session

TRUE

query_toggle_count

The number of queries after which the query block will default to
hidden.

25

Note

Disabling the save_queries setting in
your database configuration will also effectively disable profiling for
database queries and render the ‘queries’ setting above useless. You can
optionally override this setting with $this->db->save_queries=TRUE;.
Without this setting you won’t be able to view the queries or the
last_query <database/helpers>.